Bulk processing of user permission

I want to allow only some users to be able to read only some of the activity types. Like I want user belonging to a particular department to able to access only some activity types that belongs to that department. Is that possible? How can it be done?

@tanzy You can try user permissions for any kind of activity type:

If you want to bulk process user permissions --> Go to Data import --> Choose the doctype: User permissions --> and try bulk importing permissions.